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Question-1 A particle of mass M is revolving along a circle of radius R and another particle of mass m is revolving in a circle of radius r. If time periods of both particles are same, then the ratio of their angular velocities is

(A) 1	(B)^r/_R
(C)^R/_r	(D)

Question-2
A thin uniform circular ring is rolling down an inclined plane of inclination 30^o without slipping. Its linear acceleration along the inclined plane will be :

(A) ^g/₂	(B) ^g/₃
(C) ^g/₄	(D) ^2g/₃

Question-3
A solid homogenous sphere of mass M and radius R is moving on a rough horizontal surface, partially rolling and partially sliding during this kind of motion of the sphere ?

(A) Total Kinetic energy is conserved	(B) The angular momentum of the sphere about the point of contact with the plane is conserved
(C) Only the rotational kinetic energy about the centre of mass is conserved	(D) Angular momentum about the centre of mass is conserved

Question-4 Moment of inertia of a uniform circular disc about a diameter is I. Its moment of inertia about an axis perpendicular to its plane and passing through a point on its rim will be

(A) 51	(B)31
(C)61	(D)41

Question-5 A weightless ladder 20 ft long rests against a frictionless wall at an angle of 60^o from the horizontal. A 150 pound man is 4 ft from the top of the ladder . A horizontal force needed to keep it form slipping. Choose the correct magnitude of force from the following.?

(A) 17.3 pound	(B)100 pound
(C)120 pound	(D)150 pound

Question-6 A flywheel rotating about a fixed axis has a kinetic energy of 360J when its angular speed is 30 rad/s. The moment of inertia of the wheel about the axis of rotation is _______.

(A) 0.6 kgm²	(B)0.15 kgm²
(C)0.8 kgm²	(D)0.75 kgm²

Question-7 A solid sphere, disc and solid cylinder, all of the same mass and made of same material are allowed to roll down ( from rest ) on the inclined plane, then :

(A) Solid sphere reaches the bottom first	(B)Solid sphere reaches the bottom last
(C)Disc will reach the bottom first	(D)All reach the bottom at the same time

Question-8 A round disc of moment of inertia I₂ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I₁ rotating with an angular velocity ω about the same axis. The final angular velocity of the combination of discs is _____.

(A)	(B) ω
(C)	(D)

Question-9 A disc is rotating with angular velocity ω. If a child sits on it, what is conserved?

(A) Linear momentum	(B)Angular momentum
(C)Kinetic energy	(D)Moment of inertia

Question-10 A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity ω. If two objects each of mass m be attached gently to the opposite ends of a diameter of the ring, the ring will then rotate with an angular velocity

(A)	(B)
(C)	(D)

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Plus 1 Biology Science

CBSE

Practice in Related Chapters
Units and Measurements
Motion in a Straight Line
Laws of Motion
Mechanical Properties of Solids
Motion in a Plane
Waves
Gravitation
Thermodynamics
Thermal Properties of Matter
Work,Energy and Power
Kinetic Theory
System of Particles and Rotational Motion
Oscillations
Mechanical Properties of Fluids

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